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require 'active_support/core_ext/file'
module ActionView
module Helpers
module AssetTagHelper
module JavascriptTagHelpers
extend ActiveSupport::Concern
# Computes the path to a javascript asset in the public javascripts directory.
# If the +source+ filename has no extension, .js will be appended (except for explicit URIs)
# Full paths from the document root will be passed through.
# Used internally by javascript_include_tag to build the script path.
#
# javascript_path "xmlhr" # => /javascripts/xmlhr.js
# javascript_path "dir/xmlhr.js" # => /javascripts/dir/xmlhr.js
# javascript_path "/dir/xmlhr" # => /dir/xmlhr.js
# javascript_path "http://www.example.com/js/xmlhr" # => http://www.example.com/js/xmlhr
# javascript_path "http://www.example.com/js/xmlhr.js" # => http://www.example.com/js/xmlhr.js
def javascript_path(source)
asset_paths.compute_public_path(source, 'javascripts', :ext => 'js')
end
alias_method :path_to_javascript, :javascript_path # aliased to avoid conflicts with a javascript_path named route
# Computes the full URL to a javascript asset in the public javascripts directory.
# This will use +javascript_path+ internally, so most of their behaviors will be the same.
def javascript_url(source)
URI.join(current_host, path_to_javascript(source)).to_s
end
alias_method :url_to_javascript, :javascript_url # aliased to avoid conflicts with a javascript_url named route
# Returns an HTML script tag for each of the +sources+ provided.
#
# Sources may be paths to JavaScript files. Relative paths are assumed to be relative
# to <tt>public/javascripts</tt>, full paths are assumed to be relative to the document
# root. Relative paths are idiomatic, use absolute paths only when needed.
#
# When passing paths, the ".js" extension is optional.
#
# You can modify the HTML attributes of the script tag by passing a hash as the
# last argument.
#
# javascript_include_tag "xmlhr"
# # => <script src="/javascripts/xmlhr.js?1284139606"></script>
#
# javascript_include_tag "xmlhr.js"
# # => <script src="/javascripts/xmlhr.js?1284139606"></script>
#
# javascript_include_tag "common.javascript", "/elsewhere/cools"
# # => <script src="/javascripts/common.javascript?1284139606"></script>
# # <script src="/elsewhere/cools.js?1423139606"></script>
#
# javascript_include_tag "http://www.example.com/xmlhr"
# # => <script src="http://www.example.com/xmlhr"></script>
#
# javascript_include_tag "http://www.example.com/xmlhr.js"
# # => <script src="http://www.example.com/xmlhr.js"></script>
#
def javascript_include_tag(*sources)
options = sources.extract_options!.stringify_keys
sources.dup.map { |source|
tag_options = {
"src" => path_to_javascript(source)
}.merge(options)
content_tag(:script, "", tag_options)
}.join("\n").html_safe
end
end
end
end
end
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